Filed on Monday in San Jose in the U.S. District Court for the Northern District of California, Google’s initial complaint offers no evidence or reasoning to show that it isn’t violating the seven different patents that Rockstar has charged Google and its partners of violating. Instead, Google in the complaint charges Rockstar and its backers of trying to use lawsuits to harm Android and flatly asserts that it doesn’t infringe the patents.

“Google has not caused, directed, requested, or facilitated any such infringement, much less with specific intent to do so,” the company says in its complaint. “Neither the (Google’s own) Nexus devices nor Google’s Android platform are designed for use in any combination which infringes any claim of the (Rockstar) patents. To the contrary, each is a product with substantial uses that do not infringe any claim of these patents.”

The lawsuit can be seen as a consequence of the auction held in 2011 for patents held by Nortel, a bankrupt telecommunications company. Although Google participated in the auction, Rockstar, a group formed by Apple, Google, BlackBerry and other tech companies, won it with a $4.5 billion bid.

Armed with the Nortel patents, Rockstar sought to get licensing agreements from other tech companies, particularly those using Android. Earlier this year, it filed suit against Samsung, Asus, HTC and other Android licensees charging that they infringed some of the Nortel patents.

The tussle over the Nortel patents is the latest front in the ongoing patent war between Google and its allies partners and Apple, Microsoft and other tech companies. Over the last three years, Google’s Android has come to dominate the market for smartphone operating systems and, more recently, it has become a leading player in tablet operating systems also. Over a similar time period, leading Android licensee Samsung has become the dominant maker of smartphones and an increasingly important player in tablets.